pergram                package:growth                R Documentation

_C_a_l_c_u_l_a_t_e _a_n_d _P_l_o_t _a _P_e_r_i_o_d_o_g_r_a_m

_D_e_s_c_r_i_p_t_i_o_n:

     'pergram' calculates the values of a periodogram, 'plot.pergram'
     plots it, and 'plot.cum.pergram' plots the corresponding
     cumulative periodogram.

_U_s_a_g_e:

     pergram(y)
     plot.pergram(y, add=FALSE, lty=1, xlab="Frequency", ylab="Periodogram",
             main="Periodogram", ylim=c(0,max(po[,2])))
     plot.cum.pergram(y, xlab="Frequency", ylab="Periodogram",
             main="Cumulative periodogram",
             ylim=c(0,max(cpo+1.358/(a+0.12+0.11/a))))

_A_r_g_u_m_e_n_t_s:

       y: A time series vector.

     add: If TRUE, adds a new periodogram to an existing plot.

  others: Plotting parameters

_V_a_l_u_e:

     'pergram' prints and returns a two-column matrix of class,
     'pergram', containing the periodogram.

_A_u_t_h_o_r(_s):

     J.K. Lindsey

_E_x_a_m_p_l_e_s:

     y <- rnorm(100)
     print(z <- pergram(y))
     plot(z)
     plot.cum(z)

